Steps

Question 1

Steps for cleaning a cistern

Answer 1

1. Confined space safety
2. Drain
3. Scrub/power wash
4. Wet vac bottom sludge/ rinse and drain

5.refill
6. Disinfect 50mg/L of chlorine bleach

Question 2

Disinfecting a cistern

Answer 2

1L bleach for every 1000L water to equal 50mg/L of chlorine. Mix well
Run individual taps connected until chlorine smell
Allow to sit for at least 6 hours
Dump the highly chlorinated water and flush system with potable water

Question 3

When to shock chlorinate

Answer 3

After work done
After break/ incident
Installation
Lab test showing tc or ecoli
Annually flood or other damage
Changes in smell or clarity

Question 4

Shock chlorinating a well

Answer 4

Add chlorine to 50 ppm
Turn on till smell
Sit 12 hrs
Flush till no smell
Test